Use the Servo Protractor in conjunction with a servo programmer to fine-tune the travel of your servo to an exact specification! Its 1° hash marks provide for precision measurements. Simply take the horn or arm off of your servo, place your servo in the back of the Servo Protractor, and hold the servo against the aluminum standoff. You can adjust the standoff to accommodate different servo sizes. The standoff can be moved in the slotted hole, allowing you to vertically align servos of varying widths with the 0° mark.
While the protractor itself is directly compatible with servos that have the H25T spline, you can use it with a C24T spline via an included C24T horn.